import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome'
import Users from '../components/user/Users'
import rights from '../components/power/rights'
import Roles from '../components/power/Roles'
import Cate from '../components/goods/Cate'
Vue.use(VueRouter)

const routes = [
  {
    path:'/',
    redirect:'/login'
  },
  {
    path:'/login',
    component:Login
  },
  {
    path:'/home',
    component:Home,
    redirect:'/Welcome',
    children:[
      { path:'/Welcome', component:Welcome},
      {path:'/Users', component:Users},
      {path:'/rights', component:rights},
      {path:'/Roles', component:Roles},
      {path:'/categories', component:Cate},
  ]
  },
 
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next()放行   next('/login') 
  if(to.path === '/login') return next();
  //获取token
  const tokenStr =  window.sessionStorage.getItem('token')
  //如果没有token 强制跳转登录页
  if(!tokenStr) return next('/login');
  //否则放行
  next();
})

export default router
